/Engine/Source/Editor/MovieSceneTools/Public/Channels/ChannelCurveModel.h
Retrieve all keys that lie in the specified time and value range
virtual void GetKeys ( const [FCurveEditor](API\Editor\CurveEditor\FCurveEditor) & CurveEditor, double MinTime, double MaxTime, double MinValue, double MaxValue, [TArray](API\Runtime\Core\Containers\TArray)< [FKeyHandle](API\Runtime\Engine\Curves\FKeyHandle) > & OutKeyHandles ) const